Square-Taper Bottom Brackets

The square taper bottom bracket is the traditional "cotterless" bottom bracket. Now sold as sealed cartridge units, they're economical and reliable.

Shimano BB-UN26 68 x 110mm

Shimano BB-UN26 68 x 110mm E-Type

Shimano BB-UN26 68 x 113mm

Shimano BB-UN26 68 x 117mm

Shimano BB-UN26 68 x 117mm E-Type

Shimano BB-UN26 68 x 122mm

Shimano BB-UN26 68 x 123mm

Shimano BB-UN26 73 x 110mm

Shimano BB-UN26 73 x 113mm

Shimano BB-UN55 68 x 110mm

Shimano BB-UN55 68 x 113mm

Shimano BB-UN55 68 x 115mm

Shimano BB-UN55 68 x 118mm

Shimano BB-UN55 68 x 122mm

Shimano BB-UN55 68 x 127mm

Shimano BB-UN55 73 x 122mm

Shimano BB-UN55 Italian 70 x 110